<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
    <style>
        .p2{
            color: yellow;
        }
        /*#pp1{*/
        /*    color: #F28B24;*/
        /*}*/
        .p1{
            color: darkmagenta;
        }
    </style>
</head>
<body>
    <!--  class选择器  -->
    <p class="p1" id="pp1">我是p标签我是p标签我是p标签</p>
    <p class="p1" id="pp2">我是p标签我是p标签我是p标签</p>
    <p class="p2">我是p标签我是p标签我是p标签</p>
    <p class="p2">我是p标签我是p标签我是p标签</p>
    <!-- id 选择器   -->

</body>
</html>